Amazon's Jeff Bezos invests in Twitter

Everybody's favorite micro-blogging service, Twitter, has confirmed its much rumored third round of funding, which includes two new investors: Spark Capital and Amazon founder Jeff Bezos' Bezos Expeditions.

Everybody's favorite micro-blogging service, Twitter, has confirmed its much rumored third round of funding, which includes two new investors: Spark Capital and Amazon founder Jeff Bezos' Bezos Expeditions.

Twitter will become a sustainable business supported by a revenue model. However, our biggest opportunities will be worth pursuing only when we achieve our vision of Twitter as a global communication utility. To reach our goal, Twitter must be reliable and robust. Private funding gives us the runway we need to stay focused on the infrastructure that will help our business take flight. We will continue hiring systems engineers, operators, and architects, as well as consultants, scientists, and other professionals to help us realize our vision.

To take-away: Yes, Twitter has a revenue model in mind (something I presume Bezos and co. will be privy too), and ambitions to go global. But before any of that can realized, the service must become "reliable and robust".